ID   SF18_HELAN              Reviewed;         161 AA.
AC   P22357;
DT   01-AUG-1991, integrated into UniProtKB/Swiss-Prot.
DT   01-AUG-1991, sequence version 1.
DT   03-AUG-2022, entry version 86.
DE   RecName: Full=Anther-specific protein SF18;
DE   AltName: Full=Defensin-like protein;
DE   Flags: Precursor; Fragment;
OS   Helianthus annuus (Common sunflower).
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC   asterids; campanulids; Asterales; Asteraceae; Asteroideae;
OC   Heliantheae alliance; Heliantheae; Helianthus.
OX   NCBI_TaxID=4232;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [MRNA].
RC   STRAIN=cv. HA401B / Cargill; TISSUE=Anther;
RX   PubMed=2102380; DOI=10.1007/bf00017838;
RA   Domon C., Evrard J.-L., Herdenberger F., Pillay D.T.N., Steinmetz A.;
RT   "Nucleotide sequence of two anther-specific cDNAs from sunflower
RT   (Helianthus annuus L.).";
RL   Plant Mol. Biol. 15:643-646(1990).
CC   -!- FUNCTION: Anther-specific cell wall protein which could contribute to
CC       the cell wall architecture of epidermal anther cells via intermolecular
CC       disulfide bridges.
CC   -!- SUBCELLULAR LOCATION: Secreted, cell wall {ECO:0000250}.
CC   -!- TISSUE SPECIFICITY: Epidermal anther cells.
CC   -!- DEVELOPMENTAL STAGE: Late developmental stages.
CC   -!- SIMILARITY: Belongs to the DEFL family. {ECO:0000305}.
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DR   EMBL; X53375; CAA37455.1; -; mRNA.
DR   PIR; S12246; S12246.
DR   AlphaFoldDB; P22357; -.
DR   SMR; P22357; -.
DR   EnsemblPlants; mRNA:HanXRQr2_Chr16g0732551; mRNA:HanXRQr2_Chr16g0732551; HanXRQr2_Chr16g0732551.
DR   Gramene; mRNA:HanXRQr2_Chr16g0732551; mRNA:HanXRQr2_Chr16g0732551; HanXRQr2_Chr16g0732551.
DR   GO; GO:0005576; C:extracellular region; IEA:UniProtKB-KW.
DR   GO; GO:0071555; P:cell wall organization; IEA:UniProtKB-KW.
DR   GO; GO:0006952; P:defense response; IEA:InterPro.
DR   Gene3D; 3.30.30.10; -; 1.
DR   InterPro; IPR008176; Defensin_plant.
DR   InterPro; IPR003614; Scorpion_toxin-like.
DR   InterPro; IPR036574; Scorpion_toxin-like_sf.
DR   SMART; SM00505; Knot1; 1.
DR   SUPFAM; SSF57095; SSF57095; 1.
DR   PROSITE; PS00940; GAMMA_THIONIN; 1.
PE   2: Evidence at transcript level;
KW   Cell wall; Cell wall biogenesis/degradation; Disulfide bond; Secreted;
KW   Signal.
FT   SIGNAL          <1..8
FT   CHAIN           9..161
FT                   /note="Anther-specific protein SF18"
FT                   /id="PRO_0000007040"
FT   REGION          16..65
FT                   /note="Defensin-like domain"
FT   REGION          70..161
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        70..122
FT                   /note="Pro residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   DISULFID        18..65
FT                   /evidence="ECO:0000250"
FT   DISULFID        29..50
FT                   /evidence="ECO:0000250"
FT   DISULFID        35..59
FT                   /evidence="ECO:0000250"
FT   DISULFID        39..61
FT                   /evidence="ECO:0000250"
FT   NON_TER         1
SQ   SEQUENCE   161 AA;  15363 MW;  27A9CF4633ADA02B CRC64;
     LVFVVAISDI ATVNGKICEK PSKTWFGNCK DTDKCDKRCI DWEGAKHGAC HQREAKHMCF
     CYFDCDPQKN PGPPPGAPGT PGTPPAPPGK GEGDAPHPPP TPSPPGGDGG SGPAPPAGGG
     SPPPAGGDGG GGAPPPAGGD GGGGAPPPAG GDGGGAPPPG A